Be careful about buying any prescription at Walker's that must be refrigerated. My vet called in an liquid antibiotic to Walker's for my sick cat. I picked it up the next day and they told me that it needed to be refrigerated. I noticed that they pulled it off the rack and it was clearly unrefrigerated. I assumed it was OK. It wasn't. My cat developed a severe bacterial infection within hours of the dosage. The side of his throat swelled to 3x its normal size. This was totally unrelated to what my cat was being treating for that required an antibiotic. I spent over $700 at the vet trying to stop the infection caused by the tainted medicine from Walker's at Cotswold.